"The communal elements want to have their stranglehold on Delhi. (With my release) I am now free to chase them away," Yadav, who was convicted in the RC20A/96 case on September 30, told the assembled media near jail gate.
Lalu was released from the Birsa Munda Central Jail here earlier in the day.
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"I will go around the country to strengthen the secular forces. Narendra Modi, BJP or RSS will not be allowed to realise their dreams," he said.
Continuing his diatribe against 'communal' forces, Lalu said, "The communalists will be displaced from Hastinapur," (a mythological place referred in Mahabharata).
The RJD supremo claimed that the country's fate hung in balance as the year 2014 would 'decide' whether "Bharat will splinter or remain united'.
"I pray to parties with secular credentials and their leaders not to allow this happen. I urge them just to rewind to the time of 1947 when the country was partitioned. I will throw my full weight behind secular forces (to make India united)," he said.
Lalu was convicted along with 44 persons by the Special CBI Court of Prabhat Kumar Singh on September 30 in the RCA20/96 pertaining to fraudulent withdrawal of Rs 37.7 crore from the Chaibasa treasury during his tenure as Chief Minister of Bihar.
On October three the court had pronounced five year prison term and slapped Rs 25 lakh as fine on him.
After the Jharkhand High Court had rejected his bail plea, Lalu moved the apex court and obtained bail on Friday.